Codex Regius was probably written in the 13th century but nothing is known of its whereabouts until 1643 when it came into the possession of Brynjólfur Sveinsson, a Christian bishop

Brynjólfur attributed the manuscript to Sæmundr the Learned, a larger-than-life 12th century Icelandic priest. While this attribution is rejected by modern scholars, the name Sæmundar Edda is still sometimes encountered.

Bishop Brynjólfur sent Codex Regius as a present to the Danish king, hence the name. For centuries it was stored in the Royal Library in Copenhagen but in 1971 it was returned to Iceland.

Like most early poetry the Eddic poems were minstrel poems, passing orally from singer to singer and from poet to poet for centuries. None of the poems are attributed to a particular author though many of them show strong individual characteristics and are likely to have been the work of individual poets.

The dating of the poems has been a lively source of scholarly argument for a long time. Firm conclusions are hard to reach. While lines from the Eddic poems sometimes appear in poems by known poets such evidence is difficult to evaluate. For example Eyvindr skáldaspillir, composing in the latter half of the 10th century, uses in his Hákonarmál a couple of lines also found in Hávamál. It is possible that he was quoting a known poem but it is also possible that Hávamál, or at least the strophe in question, is the younger derivative work.

The few demonstrably historical characters mentioned in the poems, like Attila, provide a chronology of sorts. The dating of the manuscripts themselves provides a more useful terminus ante quem.

Individual poems have individual clues to their age. For example Atlamál hin groenlenzku is claimed by its title, and seems by some internal evidence, to have been composed in Greenland. If so, it can be no earlier than about 985 since there were no Scandinavians in Greenland until that time.

In some cases old poems can have been interpolated with younger verses or merged with other poems. For example stanzas 9-16 of Völuspá, the "Dvergatal" or "Catalogue of Dwarfs", is considered to be an interpolation.

Some poems similar to those found in Codex Regius are normally also included in editions of the Poetic Edda. Important manuscripts include AM 748 I 4to, Hauksbók and Flateyjarbók. Many of the poems are quoted in Snorri's Edda but usually only in bits and pieces.

What poems are included in an edition of the Poetic Edda depends on the editor. Those not in Codex Regius are sometimes called Eddica minora from their appearance in an edition with that title edited by Andreas Heusler and Wilhelm Ranisch in 1903.

English translators are not consistent on the translations of the names of the Eddic poems or on how the Old Norse forms should be rendered in English. Up to three translations are given below, taken from the translations of Bellows, Hollander, and Larrington with proper names in the normalized English forms found in Lindow's Norse Mythology and in Orchard's Cassell's Dictionary of Norse Myth and Legend.

OddrúnargrátrThe Lament of Oddrún, The Plaint of Oddrún, Oddrún's Lament

AtlakviðaThe Lay of Atli. (The full manuscript title is Atlakviða hin grœnlenzka, that is, The Greenland Lay of Atli, but editors and translators generally omit the Greenland reference as a probable error from confusion with the following poem.)

The heroic lays are to be seen as a whole in the Edda, but they consist of three layers, the story of Helgi Hundingsbani, the story of the Nibelungs and the story of Jörmunrekkr, king of the Goths. These are, respectively, Scandinavian, German and Gothic in origin. It is interesting to note, that as far as historicity can be ascertained, Attila, Jörmunrekkr and Brynhildr actually existed, taking Brynhildr to be partly based on Brunhilda of Austrasia, but the chronology has been reversed in the poems.

This poem, also not in Codex Regius, is sometimes included in editions of the Poetic Edda even though it is Christian and belongs, properly speaking, to the visionary literature of the Middle Ages. It is, however, written in ljóðaháttr and uses some heathen imagery.

As noted above, the Prose Edda of Snorri Sturluson makes much use of the Poetic Edda.

The Volsungasaga is a prose version of much of the Niflung cycle of poems. Due to several missing pages in the Codex Regius, the Volsungasaga is the oldest source for the Norse version of much of the story of Sigurð. Only four stanzas found on those pages are still extant, all of which are quoted in the Volsungasaga.

Thorpe, Benjamin. (Trans.). (1866). Edda Sæmundar Hinns Froða: The Edda Of Sæmund The Learned. (2 vols.) London: Trübner & Co. 1866. (HTML version transcribed by Ari Odhinnsen available at Northvegr: Lore: Poetic Edda - Thorpe Trans.) Reprinted 1906 as "The Elder Eddas of Saemund" in Rasmus B. Anderson & J. W. Buel (Eds.) The Elder Eddas of Saemund Sigfusson. Tr. from the original Old Norse text into English by Benjamin Thorpe, and The Younger Eddas of Snorre Sturleson Tr. from the original Old Norse text into English by I. A. Blackwell (pp. 1–255). Norrœna, the history and romance of northern Europe. London, Stockholm, Copenhagen, Berlin, New York: Norrœna Society. (A searchable graphic image version of this text requiring DjVu plugin is available at University of Georgia Libraries: Facsimile Books and Periodicals: The Elder Eddas and the Younger Eddas.)